Catalysis effects of K<sub>2</sub>CO<sub>3</sub> for gasification of semi-coke

Fanrui MENG; Boyang LI; Xianchun LI; Shuang QIU

doi:10.11949/j.issn.0438-1157.20181224

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Catalysis effects of K₂CO₃ for gasification of semi-coke

更新时间：2020-06-24

- Catalysis effects of K₂CO₃ for gasification of semi-coke
- CIESC Journal Issue S1, Pages: 99-109(2019)
- 作者机构：
  
  1.辽宁科技大学先进煤焦化及煤资源的高效利用工程技术中心，辽宁鞍山114051
  2.辽宁科技大学化工学院，辽宁鞍山 114051
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181224
  CLC： TQ 536.1
- Received：18 October 2018，
  
  Revised：2018-11-23，
- 稿件说明：
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孟繁锐, 李伯阳, 李先春, 邱爽. K₂CO₃对兰炭催化气化特性的影响[J]. 化工学报, 2019, 70(S1): 99-109 DOI: 10.11949/j.issn.0438-1157.20181224.

MENG Fanrui, LI Boyang, LI Xianchun, QIU Shuang. Catalysis effects of K₂CO₃ for gasification of semi-coke[J]. CIESC Journal, 2019, 70(S1): 99-109 DOI: 10.11949/j.issn.0438-1157.20181224.
孟繁锐, 李伯阳, 李先春, 邱爽. K₂CO₃对兰炭催化气化特性的影响[J]. 化工学报, 2019, 70(S1): 99-109 DOI: 10.11949/j.issn.0438-1157.20181224. DOI：

MENG Fanrui, LI Boyang, LI Xianchun, QIU Shuang. Catalysis effects of K₂CO₃ for gasification of semi-coke[J]. CIESC Journal, 2019, 70(S1): 99-109 DOI: 10.11949/j.issn.0438-1157.20181224. DOI：

摘要

在固定床中考察了不同K

植入浓度和不同温度条件下兰炭催化气化特性。结果表明，5%的催化剂植入浓度主要起到填充孔隙的作用，当植入浓度增加到10%以后，催化剂发生堆积会使颗粒表面及内部形成较多孔隙。提高气化温度可提高兰炭转化率，超过750℃之后碳转化率增幅减缓，催化剂饱和装载浓度为10%。在颗粒表面和开放孔隙中的高浓度C(O)才具有较高的脱附速率，并提高CO生成速率。在非催化条件下，随着气化的进行CO/CO

下降，而H

/(2CO

+CO)先增后减。在催化条件下，H

/(2CO

+CO)稳定在1.5～1.7。催化剂兰炭样品中出现了K

Ca(CO

)

双金属碳酸盐、K

O、KO

等活性组分，并随催化剂植入浓度的增加而增加。催化剂植入浓度的增加会导致失活现象加重，但兰炭在750℃条件下气化1 h 催化剂没有完全失活。

Abstract

Steam gasification of potassium-loaded semi-coke has been carried out with a fixed-bed laboratory gasifier at atmospheric pressure. With the K

loading increased the micropore area decreased. At a loading of 5% (mass)

the K

mainly plays the role of filling pores. Above the loading of 10% (mass)

the accumulation of catalyst will lead to more pores on the surface and interior of the particles. Increasing the gasification temperature could increase the carbon conversion rate

but above 750℃ the carbon conversion rate increased indistinctively. The loading values above which the effect was negligible were 10% (mass). High concentration of C(O) on the surface of particles and in open pores has a higher desorption rate and led to the generation rate of CO increase. Under non-catalytic conditions

CO/CO

decreased as gasification time increasing

while H

/(2CO

+CO) increased first and then decreased. Under catalytic conditions

/(2CO

+CO) was stable at 1.5－1.7. The active components

such as K

Ca(CO

)

and KO

appeared in the catalyst semi-coke samples and increased with the catalyst loading increasing. Catalyst deactivation phenomenon was aggravated due to the loading increasing

but it was not completely inactivation under the condition of gasification 1 h at 750℃.

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⁰

Catalysis effects of K2CO3 for gasification of semi-coke

DOI：10.11949/j.issn.0438-1157.20181224

摘要

Abstract

关键词

Keywords

references

Catalysis effects of K₂CO₃ for gasification of semi-coke